1
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Ahmed A, Sakander N, Rasool F, Hussain N, Mukherjee D. Diastereoselective synthesis of glycopyrans 1,2-annulated with dioxazinanes from 1,2-anhydrosugars and N-substituted nitrones. Org Biomol Chem 2022; 20:1436-1443. [PMID: 35081611 DOI: 10.1039/d1ob02310a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
1,2-Annulated pyranose sugars fused with six membered rings have emerged as an important class of carbohydrates with wide biological and synthetic utility. We now describe zinc chloride catalyzed one pot diastereoselective synthesis of sugar fused dioxazinanes from 1,2-anhydro sugars and N-substituted aromatic nitrones. Various aromatic nitrones with different substituents undergo the reaction smoothly. The developed strategy works well with both ester and ether protection on the sugar and proceeds under mild reaction conditions. The mechanism seems to involve activation of the anhydrosugar by ZnCl2 for nucleophilic attack by the nitrone followed by cyclization.
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Affiliation(s)
- Ajaz Ahmed
- Natural Product and Medicinal Chemistry Division, Indian Institute of Integrative Medicine (IIIM), Jammu-180001, India. .,Academy of Scientific and Innovative Research (AcSIR-IIIM), Jammu-180001, India
| | - Norein Sakander
- Natural Product and Medicinal Chemistry Division, Indian Institute of Integrative Medicine (IIIM), Jammu-180001, India. .,Academy of Scientific and Innovative Research (AcSIR-IIIM), Jammu-180001, India
| | - Faheem Rasool
- Natural Product and Medicinal Chemistry Division, Indian Institute of Integrative Medicine (IIIM), Jammu-180001, India. .,Department of Chemistry, Govt. College for Women, Parade Ground, Jammu-180001, India.,Higher Education Department, Govt. of Jammu and Kashmir, India
| | - Nazar Hussain
- Natural Product and Medicinal Chemistry Division, Indian Institute of Integrative Medicine (IIIM), Jammu-180001, India. .,Department of Medicinal Chemistry, Faculty of Ayurveda, Instituteof Medical Sciences, Banaras Hindu University, Varanasi-221005, India
| | - Debaraj Mukherjee
- Natural Product and Medicinal Chemistry Division, Indian Institute of Integrative Medicine (IIIM), Jammu-180001, India. .,Academy of Scientific and Innovative Research (AcSIR-IIIM), Jammu-180001, India
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2
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Chen F, Zhu C, Jiang H. [3+1+1] Annulation Reaction of Benzo‐1,2‐Quinones, Aldehydes and Hydroxylamine Hydrochloride: Access to Benzoxazoles with Inorganic Nitrogen Source. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202001521] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Fulin Chen
- Key Laboratory of Functional Molecular Engineering of Guangdong Province School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 People's Republic of China
| | - Chuanle Zhu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 People's Republic of China
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 People's Republic of China
- State Key Laboratory of Applied Organic Chemistry (Lanzhou University) Lanzhou 730000 People's Republic of China
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3
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Xiao X, Greenwood NS, Wengryniuk SE. Dearomatization of Electron-Deficient Phenols to ortho-Quinones: Bidentate Nitrogen-Ligated Iodine(V) Reagents. Angew Chem Int Ed Engl 2019; 58:16181-16187. [PMID: 31430009 PMCID: PMC6814494 DOI: 10.1002/anie.201909868] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2019] [Indexed: 01/13/2023]
Abstract
Despite their broad utility, the synthesis of ortho-quinones remains a significant challenge, in particular, access to electron-deficient derivatives remains an unsolved problem. Reported here is the first general method for the synthesis of electron-deficient ortho-quinones by direct oxidation of phenols. The reaction is enabled by a novel bidentate nitrogen-ligated iodine(V) reagent, a previously unexplored class of compounds which we have termed Bi(N)-HVIs. The reaction is extremely general and proceeds with excellent regioselectivity for the ortho over para isomer. Functionalization of the ortho-quinone products was examined, resulting in a facile one-pot synthesis of catechols, as well as the incorporation of a variety of heteroatom nucleophiles. This method represents the first synthetic application of Bi(N)-HVIs and demonstrates their potential as a platform for the further development of highly reactive, but also highly tunable, I(V) reagents.
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Affiliation(s)
- Xiao Xiao
- Department of Chemistry, Temple University, 1901 N. 13th St., Philadelphia, PA, 19122, USA
| | - Nathaniel S Greenwood
- Department of Chemistry, Temple University, 1901 N. 13th St., Philadelphia, PA, 19122, USA
- Present address: Department of Chemistry, Yale University, 225 Prospect St., New Haven, CT, 06520, USA
| | - Sarah E Wengryniuk
- Department of Chemistry, Temple University, 1901 N. 13th St., Philadelphia, PA, 19122, USA
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4
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Xiao X, Greenwood NS, Wengryniuk SE. Dearomatization of Electron‐Deficient Phenols to
ortho
‐Quinones: Bidentate Nitrogen‐Ligated Iodine(V) Reagents. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201909868] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Xiao Xiao
- Department of ChemistryTemple University 1901 N. 13th St. Philadelphia PA 19122 USA
| | - Nathaniel S. Greenwood
- Department of ChemistryTemple University 1901 N. 13th St. Philadelphia PA 19122 USA
- Present address: Department of ChemistryYale University 225 Prospect St. New Haven CT 06520 USA
| | - Sarah E. Wengryniuk
- Department of ChemistryTemple University 1901 N. 13th St. Philadelphia PA 19122 USA
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5
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Li D, Wu P, Sun N, Lu YJ, Wong WL, Fang Z, Zhang K. The Diversity of Heterocyclic N-oxide Molecules: Highlights on their Potential in Organic Synthesis, Catalysis and Drug Applications. CURR ORG CHEM 2019. [DOI: 10.2174/1385272823666190408095257] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The synthesis and chemistry of heterocyclic N-oxide derivatives such as those from pyridine and indazole are very well-known due to their usefulness as versatile synthetic intermediates and their biological importance. These classes of organic compounds have been demonstrated in many interesting and amazing functionalities, particularly vital in the areas including metal complexes formation, catalysts design, asymmetric catalysis and synthesis, and medicinal applications (some potent N-oxide compounds with anticancer, antibacterial, anti-inflammatory activity, etc.). Therefore, the heterocyclic N-oxide motif has been successfully employed in a number of recent advanced chemistry and drug development investigations. In the present review, our primary aim was to provide a relevant summary focusing on the topics of organic synthesis and medical application potential of the compounds cited, which could be attractive and give some insights to researchers in the field. Therefore, we mainly highlight the importance of heterocyclic N-oxide derivatives including those synthesized from imidazole, indazole, indole, pyridazine, pyrazine, pyridine, and pyrimidine in organic syntheses and catalysis, and drug applications. Over the past years, a number of reviews have been published on the organic synthesis and catalysis of N-oxides. We thus concentrated on highlighting those rarely mentioned or recently reported systems.
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Affiliation(s)
- Dongli Li
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, P.R, China
| | - Panpan Wu
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, P.R, China
| | - Ning Sun
- Institute of Natural Medicine and Green Chemistry, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, P. R, China
| | - Yu-Jing Lu
- Institute of Natural Medicine and Green Chemistry, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, P. R, China
| | - Wing-Leung Wong
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, P.R, China
| | - Zhiyuang Fang
- The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou 510700, P.R., China
| | - Kun Zhang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, P.R, China
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6
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Gayler KM, Lambert KM, Wood JL. Synthetic studies towards the penicisulfuranols: Synthesis of an advanced spirocyclic diketopiperazine intermediate. Tetrahedron 2019; 75:3154-3159. [PMID: 31258206 PMCID: PMC6599588 DOI: 10.1016/j.tet.2019.01.032] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The 2,5-diketopiperazine (DKP) moiety is a core feature of many natural products and medicinally relevant scaffolds. As part of our efforts directed towards a total synthesis of penicisulfuranol B, we have developed and report herein: (1) the preparation of an N-hydroxy diketopiperazine intermediate accessible via a molybdenum-mediated oxidation of a parent diketopiperazine, and (2) further synthetic studies leading to a novel spirocyclic dihydrobenzofuran-containing diketopiperazine.
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Affiliation(s)
- Kevin M. Gayler
- Department of Chemistry and Biochemistry, Baylor University, Waco, TX, 76798, USA
| | - Kyle M. Lambert
- Department of Chemistry and Biochemistry, Baylor University, Waco, TX, 76798, USA
| | - John L. Wood
- Department of Chemistry and Biochemistry, Baylor University, Waco, TX, 76798, USA
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7
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Wang Q, Wang B, Deng H, Shangguan Y, Lin Y, Zhang Y, Zhang Z, Xiao Y, Guo H, Zhang C. Silver-Catalyzed Three-Component Difunctionalization of Alkenes via Radical Pathways: Access to CF3-Functionalized Alkyl-Substituted 1,4-Naphthoquinone Derivatives. J Org Chem 2018; 84:1006-1014. [PMID: 30592606 DOI: 10.1021/acs.joc.8b02997] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Qijun Wang
- Department of Applied Chemistry, China Agricultural University, 2 Yuanmingyuan West Road, Beijing 100193, China
| | - Bo Wang
- Department of Applied Chemistry, China Agricultural University, 2 Yuanmingyuan West Road, Beijing 100193, China
| | - Hao Deng
- Department of Applied Chemistry, China Agricultural University, 2 Yuanmingyuan West Road, Beijing 100193, China
| | - Yu Shangguan
- Department of Applied Chemistry, China Agricultural University, 2 Yuanmingyuan West Road, Beijing 100193, China
| | - Yan Lin
- Department of Applied Chemistry, China Agricultural University, 2 Yuanmingyuan West Road, Beijing 100193, China
| | - Yaqi Zhang
- Department of Applied Chemistry, China Agricultural University, 2 Yuanmingyuan West Road, Beijing 100193, China
| | - Zheming Zhang
- Department of Applied Chemistry, China Agricultural University, 2 Yuanmingyuan West Road, Beijing 100193, China
| | - Yumei Xiao
- Department of Applied Chemistry, China Agricultural University, 2 Yuanmingyuan West Road, Beijing 100193, China
| | - Hongchao Guo
- Department of Applied Chemistry, China Agricultural University, 2 Yuanmingyuan West Road, Beijing 100193, China
| | - Cheng Zhang
- Department of Applied Chemistry, China Agricultural University, 2 Yuanmingyuan West Road, Beijing 100193, China
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8
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Zhang MY, Barrow RA. Total Synthesis of Boletopsin 11 Enabled by Directed ortho-C(sp2)–H Arylation. J Org Chem 2018; 83:6776-6782. [DOI: 10.1021/acs.joc.8b00792] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Meng Yao Zhang
- Research School of Chemistry, Australian National University, Acton, ACT 2601, Australia
| | - Russell A. Barrow
- Research School of Chemistry, Australian National University, Acton, ACT 2601, Australia
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9
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Synthesis of polyozellin, a prolyl oligopeptidase inhibitor, and its structural revision. Bioorg Med Chem Lett 2018; 28:930-933. [PMID: 29429833 DOI: 10.1016/j.bmcl.2018.01.054] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2017] [Revised: 01/24/2018] [Accepted: 01/26/2018] [Indexed: 11/23/2022]
Abstract
Polyozellin is a p-terphenyl compound which was isolated from Polyozellus multiplex, and exhibits an inhibitory activity against prolyl oligopeptidase (POP). Its structure was assigned as 1 having a p-terphenyl skeleton including a p-substituted dibenzofuran moiety by spectroscopic analyses and chemical means. This paper describes the total syntheses of the proposed structure 1 for polyozellin and its o-isomer 2, revising the structure of polyozellin to the latter. These syntheses involved a double Suzuki-Miyaura coupling using chlorophenylboronic acid as a common key building block, and Cu mediated Ullmann cyclization as key steps. The inhibitory activities of synthetic compounds against POP and cancer cells were also evaluated.
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10
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Davison EK, Sperry J. Natural Products with Heteroatom-Rich Ring Systems. JOURNAL OF NATURAL PRODUCTS 2017; 80:3060-3079. [PMID: 29135244 DOI: 10.1021/acs.jnatprod.7b00575] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
This review focuses on all known natural products that contain a "heteroatom-rich" ring system, specifically a five-, six- or seven-membered ring that contains three or more heteroatoms. The isolation and biological activity of these natural products is discussed, along with the biosynthetic processes that Nature employs to assemble these rare heterocyclic frameworks.
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Affiliation(s)
- Emma K Davison
- School of Chemical Sciences, University of Auckland , 23 Symonds Street, Auckland 1142, New Zealand
| | - Jonathan Sperry
- School of Chemical Sciences, University of Auckland , 23 Symonds Street, Auckland 1142, New Zealand
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11
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Gutiérrez-Bonet Á, Remeur C, Matsui JK, Molander GA. Late-Stage C-H Alkylation of Heterocycles and 1,4-Quinones via Oxidative Homolysis of 1,4-Dihydropyridines. J Am Chem Soc 2017; 139:12251-12258. [PMID: 28832137 PMCID: PMC5599171 DOI: 10.1021/jacs.7b05899] [Citation(s) in RCA: 201] [Impact Index Per Article: 28.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Under oxidative conditions, 1,4-dihydropyridines (DHPs) undergo a homolytic cleavage, forming exclusively a Csp3-centered radical that can engage in the C-H alkylation of heterocyclic bases and 1,4-quinones. DHPs are readily prepared from aldehydes, and considering that aldehydes normally require harsh reaction conditions to take part in such transformations, with mixtures of alkylated and acylated products often being obtained, this net decarbonylative alkylation approach becomes particularly useful. The present method takes place under mild reaction conditions and requires only persulfate as a stoichiometric oxidant, making the procedure suitable for the late-stage C-H alkylation of complex molecules. Notably, structurally complex pharmaceutical agents could be functionalized or prepared with this protocol, such as the antimalarial Atovaquone and antitheilerial Parvaquone, thus evidencing its applicability. Mechanistic studies revealed a likely radical chain process via the formation of a dearomatized intermediate, providing a deeper understanding of the factors governing the reactivity of these radical forebears.
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Affiliation(s)
| | | | - Jennifer K. Matsui
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
| | - Gary A. Molander
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
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12
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Takahashi S, Suda Y, Nakamura T, Matsuoka K, Koshino H. Total Synthesis of Kehokorins A-E, Cytotoxic p-Terphenyls. J Org Chem 2017; 82:3159-3166. [PMID: 28267327 DOI: 10.1021/acs.joc.7b00147] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
This paper describes a general method for the synthesis of kehokorins A-E, novel cytotoxic p-terphenyls. 2,4,6-Trihydroxybenzaldehyde served as a common building block for preparation of the central aromatic ring. Construction of their p-terphenyl skeletons was achieved by a stepwise Suzuki-Miyaura coupling, whereas the phenyldibenzofuran moiety was built up by an intramolecular Ullmann reaction. Introduction of an l-rhamnose residue into partly protected kehokorin B was performed by the trichloroacetimidate method.
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Affiliation(s)
- Shunya Takahashi
- RIKEN Center for Sustainable Resource Science , Wako, Saitama 351-0198, Japan
| | - Yasuaki Suda
- RIKEN Center for Sustainable Resource Science , Wako, Saitama 351-0198, Japan.,Division of Material Science, Graduate School of Science and Engineering, Saitama University , Saitama 338-8570, Japan
| | - Takemichi Nakamura
- RIKEN Center for Sustainable Resource Science , Wako, Saitama 351-0198, Japan
| | - Koji Matsuoka
- Division of Material Science, Graduate School of Science and Engineering, Saitama University , Saitama 338-8570, Japan
| | - Hiroyuki Koshino
- RIKEN Center for Sustainable Resource Science , Wako, Saitama 351-0198, Japan
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13
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Wani IA, Sayyad M, Ghorai MK. Domino ring-opening cyclization (DROC) of activated aziridines and epoxides with nitrones via dual-catalysis “on water”. Chem Commun (Camb) 2017; 53:4386-4389. [DOI: 10.1039/c7cc01033h] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A simple and green approach for the synthesis of non-racemic 1,2,4-oxadiazinanes and 1,4,2-dioxazinanes with excellent yields (up to 99%) and stereoselectivity (de/ee > 99%) in water has been described.
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Affiliation(s)
| | | | - Manas K. Ghorai
- Department of Chemistry
- Indian Institute of Technology
- Kanpur 208016
- India
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14
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Secondary Metabolites from Higher Fungi. PROGRESS IN THE CHEMISTRY OF ORGANIC NATURAL PRODUCTS 106 2017; 106:1-201. [DOI: 10.1007/978-3-319-59542-9_1] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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15
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Liu Y, Ao J, Paladhi S, Song CE, Yan H. Organocatalytic Asymmetric Synthesis of Chiral Dioxazinanes and Dioxazepanes with in Situ Generated Nitrones via a Tandem Reaction Pathway Using a Cooperative Cation Binding Catalyst. J Am Chem Soc 2016; 138:16486-16492. [DOI: 10.1021/jacs.6b10660] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yidong Liu
- Innovative
Drug Research Centre (IDRC), School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
| | - Jun Ao
- Innovative
Drug Research Centre (IDRC), School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
| | - Sushovan Paladhi
- Department
of Chemistry, Sungkyunkwan University, Suwon 440-746, Korea
| | - Choong Eui Song
- Department
of Chemistry, Sungkyunkwan University, Suwon 440-746, Korea
| | - Hailong Yan
- Innovative
Drug Research Centre (IDRC), School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
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16
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Yan M, Lo JC, Edwards JT, Baran PS. Radicals: Reactive Intermediates with Translational Potential. J Am Chem Soc 2016; 138:12692-12714. [PMID: 27631602 PMCID: PMC5054485 DOI: 10.1021/jacs.6b08856] [Citation(s) in RCA: 686] [Impact Index Per Article: 85.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Indexed: 02/08/2023]
Abstract
This Perspective illustrates the defining characteristics of free radical chemistry, beginning with its rich and storied history. Studies from our laboratory are discussed along with recent developments emanating from others in this burgeoning area. The practicality and chemoselectivity of radical reactions enable rapid access to molecules of relevance to drug discovery, agrochemistry, material science, and other disciplines. Thus, these reactive intermediates possess inherent translational potential, as they can be widely used to expedite scientific endeavors for the betterment of humankind.
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Affiliation(s)
- Ming Yan
- Department
of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Julian C. Lo
- Department
of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Jacob T. Edwards
- Department
of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Phil S. Baran
- Department
of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
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17
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Mailyan AK, Eickhoff JA, Minakova AS, Gu Z, Lu P, Zakarian A. Cutting-Edge and Time-Honored Strategies for Stereoselective Construction of C–N Bonds in Total Synthesis. Chem Rev 2016; 116:4441-557. [DOI: 10.1021/acs.chemrev.5b00712] [Citation(s) in RCA: 111] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Artur K. Mailyan
- Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - John A. Eickhoff
- Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Anastasiia S. Minakova
- Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Zhenhua Gu
- Department
of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Ping Lu
- Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Armen Zakarian
- Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
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18
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Pathipati SR, Singh V, Eriksson L, Selander N. Lewis Acid Catalyzed Annulation of Nitrones with Oxiranes, Aziridines, and Thiiranes. Org Lett 2015; 17:4506-9. [DOI: 10.1021/acs.orglett.5b02195] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Stalin R. Pathipati
- Department of Organic Chemistry and ‡Department of Materials and Environmental
Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Vipender Singh
- Department of Organic Chemistry and ‡Department of Materials and Environmental
Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Lars Eriksson
- Department of Organic Chemistry and ‡Department of Materials and Environmental
Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Nicklas Selander
- Department of Organic Chemistry and ‡Department of Materials and Environmental
Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
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19
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Dai JJ, Xu WT, Wu YD, Zhang WM, Gong Y, He XP, Zhang XQ, Xu HJ. Silver-Catalyzed C(sp2)–H Functionalization/C–O Cyclization Reaction at Room Temperature. J Org Chem 2014; 80:911-9. [DOI: 10.1021/jo5024238] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Jian-Jun Dai
- School of Medical Engineering, Hefei University of Technology, Hefei 230009, P. R. China
| | - Wen-Tao Xu
- School of Medical Engineering, Hefei University of Technology, Hefei 230009, P. R. China
| | - Ya-Dong Wu
- School of Medical Engineering, Hefei University of Technology, Hefei 230009, P. R. China
| | - Wen-Man Zhang
- School of Medical Engineering, Hefei University of Technology, Hefei 230009, P. R. China
| | - Ying Gong
- School of Medical Engineering, Hefei University of Technology, Hefei 230009, P. R. China
| | - Xia-Ping He
- School of Medical Engineering, Hefei University of Technology, Hefei 230009, P. R. China
| | - Xin-Qing Zhang
- School of Medical Engineering, Hefei University of Technology, Hefei 230009, P. R. China
| | - Hua-Jian Xu
- School of Medical Engineering, Hefei University of Technology, Hefei 230009, P. R. China
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20
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Takahashi S, Yoshida A, Uesugi S, Hongo Y, Kimura KI, Matsuoka K, Koshino H. Structural revision of kynapcin-12 by total synthesis, and inhibitory activities against prolyl oligopeptidase and cancer cells. Bioorg Med Chem Lett 2014; 24:3373-6. [PMID: 24948566 DOI: 10.1016/j.bmcl.2014.05.091] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Revised: 05/23/2014] [Accepted: 05/26/2014] [Indexed: 11/17/2022]
Abstract
Kynapcin-12 is a prolyl oligopeptidase (POP) inhibitor isolated from Polyozellus multiplex, and its structure was assigned as 1 having a p-hydroquinone moiety by spectroscopic analyses and chemical means. This Letter describes the total syntheses of the proposed structure 1 for kynapcin-12 and 2',3'-diacetoxy-1,5',6',4″-tetrahydroxy-p-terphenyl 2 isolated from Boletopsis grisea, revising the structure of kynapcin-12 to the latter. These syntheses involved double Suzuki-Miyaura coupling, CAN oxidation, and LTA oxidation as key steps. The inhibitory activities of synthetic compounds against POP and cancer cells were also evaluated.
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Affiliation(s)
| | - Ayaka Yoshida
- RIKEN, Wako-shi, Saitama 351-0198, Japan; Division of Material Science, Graduate School of Science and Engineering, Saitama University, Saitama 338-8570, Japan
| | - Shota Uesugi
- The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Iwate 020-8550, Japan
| | | | - Ken-ichi Kimura
- The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Iwate 020-8550, Japan
| | - Koji Matsuoka
- Division of Material Science, Graduate School of Science and Engineering, Saitama University, Saitama 338-8570, Japan
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Ma K, Han J, Bao L, Wei T, Liu H. Two sarcoviolins with antioxidative and α-glucosidase inhibitory activity from the edible mushroom Sarcodon leucopus collected in Tibet. JOURNAL OF NATURAL PRODUCTS 2014; 77:942-7. [PMID: 24645629 DOI: 10.1021/np401026b] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Edible mushrooms are known as an important source of natural antioxidants. The ethyl acetate extract of the edible mushroom Sarcodon leucopus (Zangzi mushroom) possesses strong antioxidative activity. Bioactivity-guided isolation afforded 10 compounds from its fruiting bodies, including two new sarcoviolins, sarcoviolin β (1) and episarcoviolin β (2), and one new p-terphenyl derivative (3) along with seven known compounds. The structures of the new compounds were elucidated by spectroscopic methods and comparison with the known compounds. Compounds 1-10 were found to have antioxidant effects in the DPPH scavenging assay, the total antioxidant capacity assay, the reducing power assay, and the lipid peroxidation assay. Further study indicated that they could protect DNA strands from free radical-induced cleavage at 200 μM. Compounds 1-10 also presented strong α-glucosidase inhibitory activity. Of all tested compounds, compound 1 exhibited the strongest inhibitory activity, with an IC50 value of 0.58 μM.
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Affiliation(s)
- Ke Ma
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences , No. 1 Beichen West Road, Chaoyang District, Beijing 100101, People's Republic of China
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Deb A, Agasti S, Saboo T, Maiti D. Generation of Arylated Quinones by Iron-Catalyzed Oxidative Arylation of Phenols: Formal Synthesis of Phellodonin, Sarcodonin ε, Leucomelone and Betulinan A. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201301084] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Masubuti H, Endo Y, Araya H, Uekusa H, Fujimoto Y. Establishment of Benzodioxazine Core Structure for Sarcodonin Class of Natural Products by X-ray Analysis. Org Lett 2013; 15:2076-9. [DOI: 10.1021/ol400595k] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hironori Masubuti
- Department of Chemistry and Materials Science, Tokyo Institute of Technology, Meguro, Tokyo 152-8551, Japan, and School of Agriculture, Meiji University, Higashimita, Tama-ku, Kawasaki, Kanagawa 214-8571, Japan
| | - Yasuhisa Endo
- Department of Chemistry and Materials Science, Tokyo Institute of Technology, Meguro, Tokyo 152-8551, Japan, and School of Agriculture, Meiji University, Higashimita, Tama-ku, Kawasaki, Kanagawa 214-8571, Japan
| | - Hiroshi Araya
- Department of Chemistry and Materials Science, Tokyo Institute of Technology, Meguro, Tokyo 152-8551, Japan, and School of Agriculture, Meiji University, Higashimita, Tama-ku, Kawasaki, Kanagawa 214-8571, Japan
| | - Hidehiro Uekusa
- Department of Chemistry and Materials Science, Tokyo Institute of Technology, Meguro, Tokyo 152-8551, Japan, and School of Agriculture, Meiji University, Higashimita, Tama-ku, Kawasaki, Kanagawa 214-8571, Japan
| | - Yoshinori Fujimoto
- Department of Chemistry and Materials Science, Tokyo Institute of Technology, Meguro, Tokyo 152-8551, Japan, and School of Agriculture, Meiji University, Higashimita, Tama-ku, Kawasaki, Kanagawa 214-8571, Japan
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